21386883

素因数分解:

$3^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1993}}^1$

素因数の和:2083

約数の個数: 24

約数和(自身を含む): 33642768

約数和(自身を除く): 12255885

約数列:

[1, 3, 7, 21, 49, 73, 147, 219, 511, 1533, 1993, 3577, 5979, 10731, 13951, 41853, 97657, 145489, 292971, 436467, 1018423, 3055269, 7128961, 21386883]

約数ペア:

[(1, 21386883), (3, 7128961), (7, 3055269), (21, 1018423), (49, 436467), (73, 292971), (147, 145489), (219, 97657), (511, 41853), (1533, 13951), (1993, 10731), (3577, 5979)]